Following the Reds’ 7 – 3 loss to the Giants, Cincinnati manager Lou Piniella accuses umpire Gary Darling of being biased against the Reds. The eruption occurs when Darling overrules Dutch Rennert, who had called Bill Doran’s ball a home run. The Major League Umpires Association will file a $5 million defamation suit against Piniella on the 4th.

On August 2, 1991 — Following the Reds’ 7 – 3 loss to the Giants, Cincinnati manager Lou Piniella accuses umpire Gary Darling of being biased against the Reds. The eruption occurs when Darling overrules Dutch Rennert, who had called Bill Doran’s ball a home run. The Major League Umpires Association will file a $5 million defamation suit against Piniella on the 4th.

Source:
Baseball Reference August 2
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game